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						<h1 id="firstHeading" class="firstHeading" lang="en"><span dir="auto">Hugin Preferences</span></h1>
						<div id="bodyContent">
								<div id="siteSub">From PanoTools.org Wiki</div>
								
												
				<div id="mw-content-text" lang="en" dir="ltr" class="mw-content-ltr"><div id="toc" class="toc"><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="Hugin_Preferences.html#General"><span class="tocnumber">1</span> <span class="toctext">General</span></a>
<ul>
<li class="toclevel-2 tocsection-2"><a href="Hugin_Preferences.html#Resource_usage"><span class="tocnumber">1.1</span> <span class="toctext">Resource usage</span></a></li>
<li class="toclevel-2 tocsection-3"><a href="Hugin_Preferences.html#User_interface"><span class="tocnumber">1.2</span> <span class="toctext">User interface</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-4"><a href="Hugin_Preferences.html#File_names"><span class="tocnumber">2</span> <span class="toctext">File names</span></a>
<ul>
<li class="toclevel-2 tocsection-5"><a href="Hugin_Preferences.html#File_options"><span class="tocnumber">2.1</span> <span class="toctext">File options</span></a></li>
<li class="toclevel-2 tocsection-6"><a href="Hugin_Preferences.html#Default_file_names"><span class="tocnumber">2.2</span> <span class="toctext">Default file names</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-7"><a href="Hugin_Preferences.html#Assistant"><span class="tocnumber">3</span> <span class="toctext">Assistant</span></a>
<ul>
<li class="toclevel-2 tocsection-8"><a href="Hugin_Preferences.html#Image_loading"><span class="tocnumber">3.1</span> <span class="toctext">Image loading</span></a></li>
<li class="toclevel-2 tocsection-9"><a href="Hugin_Preferences.html#Automatic_control_point_checking_after_detecting_control_points"><span class="tocnumber">3.2</span> <span class="toctext">Automatic control point checking after detecting control points</span></a></li>
<li class="toclevel-2 tocsection-10"><a href="Hugin_Preferences.html#Auto_align"><span class="tocnumber">3.3</span> <span class="toctext">Auto align</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-11"><a href="Hugin_Preferences.html#Control_Points_Editor"><span class="tocnumber">4</span> <span class="toctext">Control Points Editor</span></a>
<ul>
<li class="toclevel-2 tocsection-12"><a href="Hugin_Preferences.html#HDR_and_16bit_display"><span class="tocnumber">4.1</span> <span class="toctext">HDR and 16bit display</span></a></li>
<li class="toclevel-2 tocsection-13"><a href="Hugin_Preferences.html#Fine-tune"><span class="tocnumber">4.2</span> <span class="toctext">Fine-tune</span></a></li>
<li class="toclevel-2 tocsection-14"><a href="Hugin_Preferences.html#Rotation_search"><span class="tocnumber">4.3</span> <span class="toctext">Rotation search</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-15"><a href="Hugin_Preferences.html#Control_Point_Detectors"><span class="tocnumber">5</span> <span class="toctext">Control Point Detectors</span></a></li>
<li class="toclevel-1 tocsection-16"><a href="Hugin_Preferences.html#Stitching"><span class="tocnumber">6</span> <span class="toctext">Stitching</span></a></li>
<li class="toclevel-1 tocsection-17"><a href="Hugin_Preferences.html#Programs"><span class="tocnumber">7</span> <span class="toctext">Programs</span></a>
<ul>
<li class="toclevel-2 tocsection-18"><a href="Hugin_Preferences.html#Nona"><span class="tocnumber">7.1</span> <span class="toctext">Nona</span></a></li>
<li class="toclevel-2 tocsection-19"><a href="Hugin_Preferences.html#Enblend"><span class="tocnumber">7.2</span> <span class="toctext">Enblend</span></a></li>
<li class="toclevel-2 tocsection-20"><a href="Hugin_Preferences.html#Enfuse"><span class="tocnumber">7.3</span> <span class="toctext">Enfuse</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-21"><a href="Hugin_Preferences.html#Misc"><span class="tocnumber">8</span> <span class="toctext">Misc</span></a>
<ul>
<li class="toclevel-2 tocsection-22"><a href="Hugin_Preferences.html#Celeste"><span class="tocnumber">8.1</span> <span class="toctext">Celeste</span></a></li>
<li class="toclevel-2 tocsection-23"><a href="Hugin_Preferences.html#Photometric_optimizer"><span class="tocnumber">8.2</span> <span class="toctext">Photometric optimizer</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-24"><a href="Hugin_Preferences.html#Troubleshooting"><span class="tocnumber">9</span> <span class="toctext">Troubleshooting</span></a></li>
</ul>
</div>

<h1><span class="mw-headline" id="General">General</span></h1>
<h2><span class="mw-headline" id="Resource_usage">Resource usage</span></h2>
<p>To speed things up <a href="Hugin.html" title="Hugin">Hugin</a> keeps a copy in memory of as many input photos as possible.  With very large projects, this would use all your system memory, so set <b>Image cache memory</b> to a value below your available free RAM.  The default of 256MB should be ok for a system with 512MB of RAM, however this is very conservative, for large projects you will want to set this to a high proportion of your available system memory.
</p><p>The <a href="Hugin_Preview_window.html" title="Hugin Preview window">Preview window</a> is multi-threaded so can use more than one CPU/core if required. Set <b>Number of CPUs</b> to how many CPUs you wish to use.
</p>
<h2><span class="mw-headline" id="User_interface">User interface</span></h2>
<p>Changing the language of the user interface can be useful e.g. if you want to test your new <a href="Hugin_translation_guide.html" title="Hugin translation guide">translation</a>.
</p><p>Usually, <a href="Hugin.html" title="Hugin">Hugin</a> will use the current locale to determine the language of buttons, menus etc...
Set the <b>Language</b> if you need to switch languages temporarily or if you are using a platform such as Windows95 that doesn't support localised software.  Hugin won't change language immediately, you will need to stop and restart it.
</p><p>The "language" option in the Hugin Preferences doesn't work for the Mac version. On Mac OS X the system's country settings will be used instead: change the language setting there (i.e. drag the preferred language to the top of the list), and Hugin will reflect that when you restart the program. An alternative but more time consuming way to set another language than the current system language is to quit Hugin, reveal it's icon in the Finder, click on it and open the Information window (Cmd.-I). After deselecting all unwanted language options you can start Hugin in your preferred language.
</p><p>If the option <b>Copy log messages to clipboard</b> is activated, all log messages (from the control point detector or the assistant) are copied at the end to the clipboard.
</p>
<h1><span class="mw-headline" id="File_names">File names</span></h1>
<h2><span class="mw-headline" id="File_options">File options</span></h2>
<p>Some <a href="Hugin.html" title="Hugin">Hugin</a> actions generate large temporary files, change the <b>Temporary dir</b> to specify an alternative location for writing these files. One reason for setting this independently to the operating system default would be to use a RAM disk to speed up stitching.
</p><p>Note that intermediate stitching files are created in the output folder and not in this <b>Temporary dir</b>.
</p>
<h2><span class="mw-headline" id="Default_file_names">Default file names</span></h2>
<p>Here you can construct a default file name for saving the project and for the output prefix. You can always change the proposal when saving.
Several place holders can be used to build the file names.
</p>
<h1><span class="mw-headline" id="Assistant">Assistant</span></h1>
<p>The <a href="Hugin_Assistant_tab.html" title="Hugin Assistant tab">Assistant tab</a> automates the entire panorama creation process, these
settings allow you to customise the assistant.
</p>
<h2><span class="mw-headline" id="Image_loading">Image loading</span></h2>
<p>Select <b>Automatically align images after loading</b> to run the second <b>Align...</b>
step immediately after loading the images.
</p>
<h2><span class="mw-headline" id="Automatic_control_point_checking_after_detecting_control_points">Automatic control point checking after detecting control points</span></h2>
<p>Select <b>Remove cloud-like control points (Celeste)</b> to run <a href="Celeste_standalone.html" title="Celeste standalone">celeste</a> after detecting control points. Celeste will remove <a href="Control_points.html" title="Control points">Control points</a> set to clouds, this is useful because clouds will move several pixels between shots and are therefore bad scene objects to use for alignment.
</p><p>Select <b>Remove outlying control points by statistical method</b> to run <a href="Cpclean.html" title="Cpclean">cpclean</a>, this will try to remove control points with positions that are not credible under pairwise optimisation.
</p>
<h2><span class="mw-headline" id="Auto_align">Auto align</span></h2>
<p>Auto align uses the <a href="Hugin_Preferences.html#Control_Point_Detectors" title="Hugin Preferences">default control point detector</a> to generate <a href="Control_points.html" title="Control points">control points</a>
between pairs of images, set <b>Number of Ctrl Points per overlap</b> to control
the number of control points.  Note that although most pictures can be stitched
with just three or four control points, automatically generated points tend not
to be very evenly distributed, so this number should be set to ten or more.
</p><p><b>Note:</b> Hugins <a href="Cpfind.html" title="Cpfind">cpfind</a> does not support this parameters. So in default settings this parameter is ignored.
</p><p>The size of the output <b>Panorama Image Size</b> is usually set in the
<a href="Hugin_Stitcher_tab.html" title="Hugin Stitcher tab">Stitcher tab</a> where it is also possible to <b>Calculate Optimal Size</b>
based on the sizes of the input images.  The <b>Auto align</b> process
does something similar, though here you can set a smaller output as a percentage.
Generally setting a percentage of 70% leads to no great loss of quality due to
the way a camera <a href="CCD.html" title="CCD">CCD</a> samples data.
</p><p><br />
</p><p><br style="clear:both;" />
</p>
<h1><span class="mw-headline" id="Control_Points_Editor">Control Points Editor</span></h1>
<h2><span class="mw-headline" id="HDR_and_16bit_display">HDR and 16bit display</span></h2>
<p><a href="Hugin.html" title="Hugin">Hugin</a> supports both <a href="HDR.html" title="HDR">HDR</a> and <a href="16bit.html" title="16bit">16bit</a> imaging.  These image formats
contain a lot more brightness and colour information than can be displayed
on a standard computer monitor, so Hugin only shows a rough representation
of these pictures.
</p><p>16bit data can have <i>linear</i> or <i>corrected</i> <a href="Gamma.html" title="Gamma">gamma</a>.  Linear images
appear very dark on many monitors, so set the <b>Curve</b> to  <b>gamma 2.2</b>.
</p><p>For HDR data, try setting the <b>Curve</b>
to <b>logarithmic</b>.
</p><p>Changes to the <b>HDR and 16bit display mode</b> require restarting Hugin to
take effect.
</p>
<h2><span class="mw-headline" id="Fine-tune">Fine-tune</span></h2>
<p><a href="Hugin.html" title="Hugin">Hugin</a> helps position <a href="Control_points.html" title="Control points">control points</a> to within a fraction of a pixel distance automatically:
</p>
<ul>
<li> When <b>auto fine-tune</b> is selected in the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">Control Points tab</a> while picking control points.
</li>
<li> When clicking <b>Fine-tune</b> in the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">Control Points tab</a>
</li>
<li> When picking <b>Fine-tune all Points</b> in the <a href="Panorama_Editor_window.html" title="Panorama Editor window" class="mw-redirect">Panorama editor window</a> <b>Edit</b> menu.
</li>
</ul>
<ul>
<li> <b>Patch width</b>, the size of the square of pixels taken from the left photo to match with the right photo when picking <a href="Control_points.html" title="Control points">control points</a>, reduce if this is taking a long time on your system.
</li>
<li> <b>Search area width</b>, the percentage area of the right photo that is searched when picking <b>control points</b>, reduce if this is taking a long time on your system.
</li>
<li> <b>Local search area width</b>, the region of the right photo searched when you click <b>Fine-tune</b> in the <a href="Hugin_Control_Points_tab.html" title="Hugin Control Points tab">Hugin Control Points tab</a> or <b>Fine-tune all Points</b> in the <a href="Panorama_Editor_window.html" title="Panorama Editor window" class="mw-redirect">Panorama editor window</a> <b>Edit</b> menu.
</li>
<li> <b>Correlation Threshold</b>. For each <b>Fine-tune</b>, <a href="Hugin.html" title="Hugin">Hugin</a> calculates the quality of the <b>control points</b> match, raise this threshold to reject dubious matches.
</li>
<li> <b>Peak Curvature Threshold</b>, Currently unused.
</li>
</ul>
<h2><span class="mw-headline" id="Rotation_search">Rotation search</span></h2>
<p>Enable this if your photos:
</p>
<ul>
<li> have a very wide angle <a href="Field_of_View.html" title="Field of View">Field of View</a> or <a href="Fisheye_Projection.html" title="Fisheye Projection">fisheye Projection</a>.
</li>
<li> are tilted up or down, <a href="Control_points.html" title="Control points">control points</a> near the <a href="Zenith.html" title="Zenith">zenith</a> or <a href="Nadir.html" title="Nadir">nadir</a> may need to have full 360 degree rotation search
</li>
</ul>
<p><br style="clear:both;" />
</p>
<h1><span class="mw-headline" id="Control_Point_Detectors">Control Point Detectors</span></h1>
<p><a href="Hugin.html" title="Hugin">Hugin</a> uses an internal or external tool for automatically creating <a href="Control_points.html" title="Control points">control points</a> for a set of images either when
</p>
<ul>
<li> clicking the <b>2. Align...</b> button in the <a href="Hugin_Assistant_tab.html" title="Hugin Assistant tab">Hugin Assistant tab</a> or
</li>
<li> clicking the <b>Create control points</b> button in the <a href="Hugin_Photos_tab.html" title="Hugin Photos tab">Photos tab</a>.
</li>
</ul>
<p><i>Note: If you have upgraded from an older release of Hugin, you will need to <b>Load Defaults</b> to update these preferences.</i>
</p><p>In the <b>Control Point Detector Programs</b> list box you can choose between several presets such as:
</p>
<ul>
<li> <b><a href="Cpfind.html" title="Cpfind">Hugin's CPFind</a></b> - This is the internal general purpose control point generator of hugin.
</li>
<li> <b>Hugin's CPFind + Celeste</b> - This is the same as the <a href="Cpfind.html" title="Cpfind">CPFind</a> setting but it will also remove points in areas of sky using the celeste<a class="external" href="http://wiki.panotools.org/index.php?title=Celeste&amp;action=edit&amp;redlink=1">[*]</a> tool. See <a href="Using_Celeste_with_hugin.html" title="Using Celeste with hugin">Using Celeste with hugin</a> for more details.
</li>
<li> <b>Cpfind (multirow/stacked)</b> - This is the same as the <a href="Cpfind.html" title="Cpfind">CPFind</a> setting, except that <a href="Align_image_stack.html" title="Align image stack">Align image stack</a> is used to match photos in <a href="Bracketing.html" title="Bracketing">bracketed</a> stacks.
</li>
<li> <b><a href="Autopano-sift-C.html" title="Autopano-sift-C">autopano-sift-C</a></b> - a C version of <a href="Autopano-sift.html" title="Autopano-sift">autopano-sift</a>, wwhich needs to be installed separately.
</li>
<li> <b><a href="Panomatic.html" title="Panomatic">Panomatic</a> (by Anael Orlinski)</b>, which needs to be installed separately.
</li>
<li> <b>autopano-sift-c (multirow/stacked)</b> - This is the same as the <a href="Autopano-sift-C.html" title="Autopano-sift-C">autopano-sift-C</a> setting, except that <a href="Align_image_stack.html" title="Align image stack">Align image stack</a> is used to match photos in <a href="Bracketing.html" title="Bracketing">bracketed</a> stacks.
</li>
<li> <b><a href="Align_image_stack.html" title="Align image stack">Align image stack</a></b> - part of Hugin suite. Note that align_image_stack is not a general purpose control point detector, but it is very effective for aligning images within stacks.
</li>
<li> <b>Align image stack FullFrameFisheye</b> - This the same as the <a href="Align_image_stack.html" title="Align image stack">Align image stack</a> setting above except with an additional setting suitable for fisheye images.
</li>
</ul>
<p>Parameters for these tools can be customized in the <a href="Hugin_Parameters_for_Control_Point_Detectors_dialog.html" title="Hugin Parameters for Control Point Detectors dialog">Hugin Parameters for Control Point Detectors dialog</a> which you can access by clicking one of the buttons <b>Edit...</b> or <b>New...</b>.
</p><p>These <a href="Hugin_Parameters_for_Control_Point_Detectors_dialog.html" title="Hugin Parameters for Control Point Detectors dialog">parameters</a> are also helpful if you want to use a similar command line tool that isn't already listed. Click the <b>New...</b> button to configure a new preset to use in the <a href="Hugin_Assistant_tab.html" title="Hugin Assistant tab">Assistant</a> or the <a href="Hugin_Photos_tab.html" title="Hugin Photos tab">Photos tabs</a>.
</p><p>The <b>Set default</b> button will mark the preset selected in this list box to be used automatically in the <a href="Hugin_Assistant_tab.html" title="Hugin Assistant tab">Assistant tab</a> when clicking the <b>2. Align...</b> button.
</p>
<h1><span class="mw-headline" id="Stitching">Stitching</span></h1>
<p>In the final stitching process <a href="Nona.html" title="Nona">nona</a> reprojects and distorts images to fit, <a href="Enblend.html" title="Enblend">enblend</a> takes these
images as individual <a href="TIFF.html" title="TIFF">TIFF</a> files and merges them using sophisticated seam positioning and blending and/or Exposure fusion<a class="external" href="http://wiki.panotools.org/index.php?title=Exposure_fusion&amp;action=edit&amp;redlink=1">[*]</a> into
a single finished image file. These processes can be hold together by PTBatcherGUI<a class="external" href="http://wiki.panotools.org/PTBatcherGUI">[*]</a> or <a href="Hugin_stitch_project.html" title="Hugin stitch project">hugin_stitch_project</a>. Select here processor should be used:
</p>
<ul>
<li> PTBatcherGUI<a class="external" href="http://wiki.panotools.org/PTBatcherGUI">[*]</a> can queue several projects and can also work unattended and shutdown the computer at the end (e.g. running over night)
</li>
<li> <a href="Hugin_stitch_project.html" title="Hugin stitch project">hugin_stitch_project</a> can only work on one project. It is not recommended to start several processes simultaneously.
</li>
</ul>
<p><b>Important note:</b> The settings here are the defaults for <i>new projects</i>, change settings for the <i>current project</i> in the <a href="Hugin_Stitcher_tab.html" title="Hugin Stitcher tab">Hugin Stitcher tab</a>.
</p>
<h1><span class="mw-headline" id="Programs">Programs</span></h1>
<p>Here you can define programs for the different stitching steps and set default options for them.
</p>
<h2><span class="mw-headline" id="Nona">Nona</span></h2>
<p>Here you can set the <b>Default interpolator</b> used during stitching. <a href="Interpolation.html" title="Interpolation">Interpolation</a> is a quality setting, but the default of <b>Poly3 (Bicubic)</b> is good for most purposes. You are unlikely to notice any difference between interpolators other than that <b>Nearest neighbor</b> is fast but very low quality.
</p><p>You can <b>Create cropped images by default</b>, these <a href="Cropped_TIFF.html" title="Cropped TIFF">Cropped TIFF</a> images will speed up stitching, but some image editors do not process the offsets correctly.
</p><p><b>Use GPU for remapping</b> will activate experimental <a href="Nona.html" title="Nona">nona</a> code to remap images using the shading language of the <i>Graphics Processing Unit</i> in modern video hardware. However some projections and the translation parameters are not yet supported by this experimental code. In this case Nona will automatically switch back to CPU calculation.
</p>
<h2><span class="mw-headline" id="Enblend">Enblend</span></h2>
<p>The <b>Use alternative Enblend program</b> option allows you to use other tools with a similar interface
such as smartblend<a class="external" href="http://wiki.panotools.org/Smartblend">[*]</a> or enblend-mask<a class="external" href="http://wiki.panotools.org/index.php?title=Enblend-mask&amp;action=edit&amp;redlink=1">[*]</a>.
</p><p>enblend supports a range of <b>Additional arguments</b>, for example you may want to set:
</p>
<ul>
<li> <b>-a</b>                Pre-assemble non-overlapping images to speed up blending.  This is generally useful, but will slow blending in rare cases.
</li>
<li> <b>-l number</b>         Number of levels to use (1 to 29), larger numbers result in wider seams. E.g. setting 1 will result in a 2 pixel wide blend, 8 will result in a 256 pixel wide blend and you are extremely unlikely to want a blend level as high as 16.
</li>
<li> <b>-b kilobytes</b>      Image cache block size (default=2MiB)
</li>
<li> <b>-c</b>                Use CIECAM02 to blend colors.  Your input images need to have embedded <a href="Colour_profile.html" title="Colour profile">colour profiles</a> for this to work.
</li>
<li> <b>-m megabytes</b>      Use this much memory before going to disk (default=1GiB).  Increase if you have a lot of memory on your system.
</li>
<li> <b>--fine-mask</b>       Enables detailed mask generation.
</li>
<li> <b>--no-optimize</b>     Turn off mask optimization.
</li>
</ul>
<p>Note that setting <b>Additional arguments</b> here will only effect new projects, to change <a href="Enblend.html" title="Enblend">enblend</a> and <a href="Enfuse.html" title="Enfuse">enfuse</a> settings for the current project use the <a href="Hugin_Stitcher_tab.html" title="Hugin Stitcher tab">Hugin Stitcher tab</a>.
</p>
<h2><span class="mw-headline" id="Enfuse">Enfuse</span></h2>
<p>If one of <b>Exposure fusion</b> output options is selected in the <a href="Hugin_Stitcher_tab.html" title="Hugin Stitcher tab">Stitcher tab</a> then <a href="Enfuse.html" title="Enfuse">enfuse</a> will be used to merge bracketed exposures during stitching.
</p>
<h1><span class="mw-headline" id="Misc">Misc</span></h1>
<h2><span class="mw-headline" id="Celeste">Celeste</span></h2>
<p>Often a project has many control points attached to clouds in the sky, this is usually unwanted as clouds move between photos. <a href="Using_Celeste_with_hugin.html" title="Using Celeste with hugin">celeste</a> will attempt to identify 'sky' control points and delete them.
</p>
<h2><span class="mw-headline" id="Photometric_optimizer">Photometric optimizer</span></h2>
<p>The photometric optimizer on the <a href="Hugin_Exposure_tab.html" title="Hugin Exposure tab">Exposure tab</a> samples the here given number of points and tries to determine with which <a href="Camera_response_curve.html" title="Camera response curve">camera response curve</a>, <a href="Vignetting.html" title="Vignetting">vignetting</a> and exposure compensation the images need to be stitch to get no changes in colour or luminescence. For difficult projects it can be helpful to increase this number.
</p>
<h1><span class="mw-headline" id="Troubleshooting">Troubleshooting</span></h1>
<p>Sometimes when updating a hugin installation new features such as the settings for a new control point editor won't appear where expected. The cause might be a conflict with the preferences file of a previous version of hugin. A good idea before pressing the "Reset do defaults" button might be to back up the old preferences file since it is a plain text file that contains your specific settings in a readable format. Saving this file gives you the chance to recreate these individual settings later on. The name and location of the preferences file is this for the following platforms:
</p>
<ul>
<li>Linux: ".hugin" can be found in your home directory <b>(FIXME)</b>
</li>
<li>Mac OS X: "hugin Preferences" can be found in <i>Macintosh HD/Users/&lt;YourUserAccount&gt;/Library/Preferences/</i>
</li>
<li>Windows: <b>(FIXME)</b>
</li>
</ul>
<p>Quit hugin, rename the preferences file (e.g. add the previous version number) and on the next start of hugin a new preferences file will be generated.
</p><p>Other fixes for occurring problems can be found in the <a href="Hugin_FAQ.html" title="Hugin FAQ">Hugin FAQ</a>.
</p><p><br style="clear:both;" />
</p>



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